Process for the manufacture of camphor.



I To all whom itmay concern .i

- w s r JACOB SCHMI'IZANDV'GERHARD STALll/IANLL; or DUs'sELnoRF, GERMANY, AssIGN'oRs- Maria? @EFICE.

TO mm FIRM OF DR. so'HMrrz n. o0.- e. M512. H}, or IJ ssELDonF, GERMANY.

1\T o Drawing. I

Be it known that We, JACOB Sormi-rrz and GERHARD SrALMANN, subjects of the King of Prussia' German Emperor, residing at 54 Himmelsgeis'terstrasse, Dusseldorf, -Kinf 1;-, dom of Prussia, German Empire, have jointly invented new and useful Improve 'ments in Processes forthe Manufacture of Camphor, of which the following is a specification. p j 7 Thepresent invention refers to a process for manufacturing camphor from "isoborneol p or substances. suitable for conversion into isoborneol, as borneol, esters of bornekil,

and esters of isoborneol. H The new process conslsts 1n heat ng t-he fsaicl substances to a'temper'ature above 100 degrees centigrade ina medium of alkaline; reactionwith oiridizingsubstances. As oXi- -cli7-ing substances We may use for instance: peroxid of manganese, manganites, peroxicl of" lead,'p1u mbates,'permanganates, thefoxids of coppe'r,-nickel, mercury,.etc. If the" bXidizing'subst-ance or the product, formed from it by the reduction process, is 'sufii ciently basic to prevent a formation ofcamphene, which is easily formed from isobor-' -neol, an addition of bases is not requiredl during 1O hourswith 25 kilograms of caustic soda and kilograms; of peroxid of man-' It is, howeve'r,' generally preferable'to add bases, even if without that addition the formation of camph'ene may be avoided, as is v the. casewh'en using oxid ofcopperzor oxid of nickel as the ox dlzing substances oxld of manganese-mused as the oxidizing If persubstance. the addition of bases, as --for in stance 'oXicl of calcium, hydroxid of calcium} is'necessary.

am s.

r 1. '25 kilograms of isoborneol -are heated gan'ese' to a tem eratureof 250 degrees cen- "tigrade'. The ormedcamphor. isjisolated by distillation with water. steam.

Serial No. 418,326.

Water 1 Caustic manganese Campho'r I soda 2. 25 kilograms of isob'orneol areheated during 10 hours w1th'25 kilograms of Water,

25 kilograms of caustic socla and 50 kilo- P te aaapa1s,1911;

I The reaction which takes place may be grams of peroxicl of manganese to a temperature 019250 degrees centigracle; It is preferable to agitate themixture during the process. 1 25 kilograms of isoborneol are heated during 10 hours with 25 kilograms of ater, 25 kilograms 0Xid;' of calcium and, 50 kilo- 250 degrees centigrade. 25 kilogramswof isoborneol 25 kilo: grams .of Water, 25 kilograms of caustic soda, and kilograms of oxicl of copper are heated during lt hours to a temperature of 250 degreescentigrade.

' '5. 25 kilograms of borneol, 25 kilograms ofavater, 50 kilograms of oxid of nickel and 25 kilograms of oxicl of calcium are heated during 10.ho.urs to a temperature of 250 de-.

.grees centigrade.

' 6.25 kilograms of isoborneol, 25 kilograms of Water, 100 kilograms of manganite grams of peroXicl of'lead to a temperature of ofcalci um and 25 kilograms of oxid of ca l eium are heated during 10' hours to a temperature of 250 degrees centigrade.

" 7.25. kilograms of acetate of isoborneol,

35 kilograms of caustic soda, 50'kilograms of peroxid of manganeseand 50 kilograms degrees Centigrade. v i The basic compounds, andthe' oxid zing of ater are heated to a temperature of 250 means are chosen according to the actual.

cheap'ness. 'We claim-I The .p'rocess for manufacturing 'cam-' 'phor vvhich consists in heating isoborneol I asaeei' phor which consists in heating isoborneol with peroxids of the metals and hydrates of with oxids of the metals in a medium of. basicreaction to temperatures above 100 (le-vv grees centigrade. I

2. The process 'for manufacturing camwith peroxide of the metals in a medium of alkaline reaction to temperatures above 100, degrees Centigrade. I

3. The process for manufacturing camphor, which consists in heating isoborneol the alkali andalkaline-earth metals to temperatures above 100 degreescentigrade.

In testimony whereof we afiixed our sig- 15 natures in presence of two witnesses JACOB sCHMITZ. GERHARD STALMANN. Witnesses: V PETER LIEBER,. v 'WILHELM Fri-AS01112; 

